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https://en.wikipedia.org/wiki/United_States_Coast_Guard
The United States Coast Guard (USCG) is a branch of the United States Armed Forces and one of the country's seven uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the U.S. military branches for having a maritime law enforcement mission (with jurisdiction in both domestic and international waters) and a federal regulatory agency mission as part of its mission set. It operates under the U.S. Department of Homeland Security during peacetime, and can be transferred to the U.S. Department of the Navy by the U.S. President at any time, or by the U.S. Congress during times of war. This has happened twice, in 1917, during World War I, and in 1941, during World War II.[8][10]
Created by Congress on 4 August 1790 at the request of Alexander Hamilton as the "Revenue Marine", it is the oldest continuous seagoing service of the United States.[Note 2] As Secretary of the Treasury, Hamilton headed the Revenue Marine, whose original purpose was as the collector of customs duties in the nation's seaports. By the 1860s, the service was known as the U.S. Revenue Cutter Service and the term Revenue Marine gradually fell into disuse.[15]
The modern Coast Guard was formed by a merger of the Revenue Cutter Service and the U.S. Life-Saving Service on 28 January 1915, under the U.S. Department of the Treasury. As one of the country's five armed services, the Coast Guard has been involved in every U.S. war from 1790 to the Iraq Wars[16] and the War in Afghanistan.[17] As of 2012 the Coast Guard had approximately 42,000 men and women on active duty, 7,900 reservists, 32,000 auxiliarists, and 8,700 full-time civilian employees.[4] In terms of size, the U.S. Coast Guard by itself is the world's 12th largest naval force.[18]
The Coast Guard's legal authority differs from the other four armed services, as it operates simultaneously under Title 10 of the U.S. Code and its other organic authorities, such as Titles 6, 14, 19, 33, and 46. Because of its legal authority, the Coast Guard can conduct military operations under the U.S. Department of Defense or directly for the President in accordance with Title 14 USC 1–3. The Coast Guard's enduring roles are maritime safety, security, and stewardship. To carry out those roles, it has 11 statutory missions as defined in 6 U.S.C. § 468, which include enforcing U.S. law in the world's largest exclusive economic zone of 3.4 million square miles (8,800,000 km2).[19] The Coast Guard's motto is Semper Paratus (English: Always ready).
The Coast Guard has roles in maritime homeland security, maritime law enforcement (MLE), search and rescue (SAR), marine environmental protection (MEP), and the maintenance of river, intracoastal and offshore aids to navigation (ATON).
With a decentralized organization and much responsibility placed on even the most junior personnel, the Coast Guard is frequently lauded for its quick responsiveness and adaptability in a broad range of emergencies. In a 2005 article in Time magazine following Hurricane Katrina, the author wrote, "the Coast Guard's most valuable contribution to [a military effort when catastrophe hits] may be as a model of flexibility, and most of all, spirit." Wil Milam, a rescue swimmer from Alaska told the magazine, "In the Navy, it was all about the mission. Practicing for war, training for war. In the Coast Guard, it was, take care of our people and the mission will take care of itself
The Coast Guard carries out three basic roles, which are further subdivided into eleven statutory missions. The three roles are:
Maritime safety Maritime security Maritime stewardship The eleven statutory missions as defined by law are divided into homeland security missions and non-homeland security missions